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New Complexes of Actinides with Monobromoacetate Ions: Synthesis and Structures.

ABSTRACT: Synthesis, FTIR spectral study, and X-ray diffraction analysis of single crystals of (CH₃)₄N[UO₂(mba)₃] (I), (CH₃)₄N[NpO₂(mba)₂(NO₃)] (II), (CH₃)₄N[PuO₂(mba)₂(NO₃)] (III), and (CH₃)₄N[NpO₂(mba)(NO₃)₂] (IV), where mba is a monobromoacetate ion (CH₂BrCOO^-), were conducted. The main structural units of crystals I-IV are mononuclear anionic complexes of the [AnO₂(mba)₃]^-, [AnO₂(mba)₂(NO₃)]^-, or [AnO₂(mba)(NO₃)₂]^- composition. All these complex units are characterized with the same crystal-chemical formula AB ⁰¹ ₃ (A = AnO₂ ²⁺ and B ⁰¹ = CH₂BrCOO^- or NO₃ ^-). Using the method of molecular Voronoi-Dirichlet polyhedra, the contributions of various types of noncovalent interactions into the formation of supramolecular structures of the obtained complexes were characterized. The analysis of coordination modes of all monobromoacetate-containing compounds from the Cambridge Structural Database was accomplished. Actinide contraction in the studied compounds is discussed.

SUBMITTER: Uhanov AS

PROVIDER: S-EPMC8388085 | biostudies-literature |

REPOSITORIES: biostudies-literature

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